Spring shackle



Jan., 20, 1931. R. H. CHILTON SPRING .SHACKLE Filed sept. s, 192'.'

EWI.

Patented Jan. 20,1931v RALPH H.

COMPANY, 0F DY'IoNiJoHIqA doRPdATIo'NgoF DELAWARE- PRING sHAex-LE ipplicatioi leci ASeptember 9, 1525;?. Seriai io. S. l l

This invention elates tb li'exible' lcumflifig members, especially` lsleh as' e adapte use as s ring shackles for autioblls.

improved forni of flexible elip'liil of Fll canized i'llbber and abic inteia h'ailg the advantages of coniiiy of Inai'faetue, eiieincy of pelfation, and longr life. y

Reference is tb epe'ndin-prii' 1li applications, seiiallslos; 111,781 iilel 5111,15, 1926, 141533111211061. 15, 192e 111111871337 filed Apil 30, 1927. 'All bjec't of thel present inirentioi is to Combine celtainfetils fou'ntl these '151101' 15 appliiitins with other fetiirest provide an `improved form of spring, shackle." F instantie, `the gen'eal clllibbell fn, O this pe'sit Sha'ekle is slilan tthat 'of Seifial NOS. 141,737 iid 141,788, hweve il. lies-i111 iolintli'ng 'and retaining the central neck poif- 10 which sind pi oihi iei'gii p iiiiils fina leflgiiieiii iliid eiiiiseiipid 11111111110111111111 Aiieililiiieliiie 01 1111s iniieiiiiiili is the relatively siifiinsee iubliei ilii'd fibii@ @die 1101111011101 the molded iiiiitV 'fili yieldiibly ij:

vFiiillllii Objects iiiil iliiiiiifges 111; 111s" present invention will ppaent fem'the foll'wing desd'iption, referente biiig; t

eige section-flieen `eil Figi. 1

Sliiipkl, 1o being 'ille elias-isis side iiil o. il iiiiiii'g rigidly @01111801211 iheiieiii iiiili l1 the I The iii-(lined iiiiii, iild'iei-dis i allele-By CHILTON, or DAYTN; oHI, llllsIcilv'R'TIS :um INLAND ANFAcTU-G piiiiiiiiy if iiiifiii of iiiiiibeiiz'dfeiiili fill-iii;

wrapped willi iii@ iioiieiiieiisieligeiils ilieiof extending iii @I peiiplieiil; iieiii. T liiisfliixiblii ilisiilg'-1eis1piiivililiil willi the 111111111161 iii Siiii mail iiliiiiipiiig i iiisi';i.ls4 2U liayiiig sli-inks e1, piieillbly iigidlytiiieiiil i ihiedii llifeiefiii, piojeeiiiig iiiwiidliy" iliiiiiigii .iiiiiiiiiies iii Casing 16, is eliiilyg a iiiiliiiivl'y soit 11111311111111111161 251 vllleiiili'zed lil 11111@ to all th, 0111161111131 pari-.s

iqiiiiii 'ille iiisjide 011 111e i1-eel: `11111111011 1961 the easing ies'eveial liiyeifs of sjiibsiiiii'- l'iiilly iioiiieiiiiii 51111111iiililieiiizeii fi-0111 fibiig@ l of ille iiioldeil iiii'ii 15 Siibsiiiiiiillyiigid iiifl` capable f "sli per"ting' the leads upon the 11i ililii iiiipll eiiii of 'ille Fields/il iiiiii i5 a.

ililiiilvf'ly Siiii iilbliiiiizeii iilb'lie Seel ao' is beiiieil 1li@ seal 30111111111116111111@ lisiip's 17 e'l'i iiiiaiiiliiipliiiieiiiiliilieiveage-sliepen Spaces Y wedge-shaped cushions 32 are molded to the exterior surface of the lower flexible loop 17 to properly cushion the casing 16 from the metal seat 35 during the swinging movement of the molded unit and to also prevent sand'ory foreign matter fromiinding lodgment in the space. VT hismolded unit; made as above described,

Vis vulcanizedV as agwhole in a die mold, with the metal clamping inserts 20 properly fixed in place in the mold, and all the fabric and rubber portions are firmly bonded together by the vulcanization. ln orderfto get the desired degree ofstiffness in the core portion 18, this part -be first built up of rubber and fabric plies and'semi-vulcanized before being used to build up the unit 15 as described above. i y,

' In order to assemble the unit 15 in place between the parts 10 and 11, the upper shank 21 is inserted through ahole 22 in part 10 and nut 23 applied tothe projecting threaded end of shank 21.` It will be obvious that by setting upnut 23 very tight the upper end of the flexible'loop 17 and the fabric seat 30 will be clamped in fixed relation to part l0. vThe lower shankV 21 is inserted through holes inv the concave seat member 35 and the spring end 11, the washer 24 applied, and then the lower nut 28 set up tight to firmly clamp these parts tothe spring end 11.k In operation, the substantially rigid midportionofthe molded unit 15 swings angularly in a direction longitudinally of spring 12 to permit the to and Vfro movement ofthe spring end 11. The end loops 17 and the soft rubber portions 25 are' suliicientlyexible to easily permit Athe required pivoting of unit 15 at each end thereof. The soft rubber cushions-31 and 82 yieldably cushion the end loops lZupon the stationary seatsBO and 35, and4 also prevent mud, dirt, gravel, etc. from entering the wedge-shaped spaces `occupied thereby. YThe slightly yieldable core portion 18 substantially ymaintains ythe' form ofthe molded unit at ally times, thatis, it limits thet distortion thereof due to itshardness and strength under compression, while at the same time it permits easy-pivotal movement atthe ends of the molded'unit.

While the form of embodiment of the presentv invention as herein disclosed, constitutes a preferred form, it is lto be understood that other forms mightbe adopted, lall coming l within the scope ofthe yclaims which follow.

VVhat is claimed isa's follows:

V1*.An extension shackle connecting two relatively movable `members and having a molded rubber and fabric swinging element comprising: a flexible rubberized fabric casing, two metalV clamping. inserts at opposite portions of said vcasing for fixing said portions to saidrelatively movablemembers respec- 2. A springshackle connectingthe end por` y tion of a leaf spring to amember supported thereby andl having a molded rubber and i fabric swinging elementl comprisingafflem. yible rubberized fabric 'casing molded substantially in the form of adumb-bell, elastic rubber and fabric material filling the interior of said casing, and an exterior `rubberized fabric belt confining the neck portion of sai l dumb-bell, all the portions. of said swinging element being vulcanized together to form an.

integral whole. y Y

3; A spring shackle connecting the end portion of a leaf spring to a member supported thereby and having a molded rubber and fabric swinging element comprising: a flexible rubberized fabric casingmolded in dumb- Y bell form, a relatively stiff rubber and fabric compression resisting portion extending longitudinally within said dumb-bell casing, relatively soft and elastic rubber material filling the end loops of said dumb-bell casing, and an exterior rubberized fabric belt confining the central portion of said swinging element. c y' 1. A spring shackle connecting the end portion of a leaf spring to a member Vsupported thereby and havinga molded rubber and' fabric swinging elementcomprising: a relatively's'tiff core built up from a plurality of layers yof rubberized fabric, relatively soft rubber surrounding the end portions of said core, a t flexible rubberized fabric casing molded in dumb-bell form about said core and soft rubber, and an exterior rubberized fabric belt coniining the central 'portion of said swinging element. Y

5. An extension shackle connecting two relatively movable fmembers and having' 4a molded rubber and fabric swinging element comprising: a liexible vrubberized fabric material within said casing, and an exterior rubberized' fabric belt surrounding and confining the centralportion.ofsaid swinging element, said portions of said swinging element being" vulcanized together Vto* form lan integral unit. l

6. An extension shackle connecting two relatively movable members and having a molded rubberand fabric swinging element comprising: `a flexible rubberized fabric casing molded substantially in the Vform of a dumb-bell, elastic rubber material .withinv said casing, and an exterior laterally wound rubberized fabric belt confining the neck p0rtion of said duInbLbell, all said portions or said swinging element being vulcanized together to form an integral unit.

7. An extension shackle connecting two relatively movable members and having a molded rubber and fabric swinging element comprising: a Vflexible `rubberized fabric easing, two metal clamping inserts molded in situ at opposite end portions of said easing for fixing said portions to said relatively movable members respeetively,a relatively stiff rubber and ber compression resisting portion eX- tending substantially between said metal inserts Within said easing, relatively soft and elastic rubber material Completing the filling oi the end portions of said casing,A and means exterior of said casing for confining the eentral portion of said swinging element.

In testimony whereof I hereto ailiX `my signature.

RALPH H. CHILTON.

Cil 

